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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 24 |
| 3 | 55 |
| 4 | 125 |
| 5 | 282 |
| 6 | 635 |
| 7 | 1428 |
| 8 | 3210 |
| 9 | 7214 |
| 10 | 16211 |
| 11 | 36427 |
| 12 | 81852 |
| 13 | 183921 |
| 14 | 413268 |
| 15 | 928606 |
| 16 | 2086560 |
| 17 | 4688459 |
| 18 | 10534873 |
| 19 | 23671646 |
| 20 | 53189707 |
| 21 | 119516188 |
| 22 | 268550438 |
| 23 | 603427358 |
| 24 | 1355888967 |
| 25 | 3046654855 |
| 26 | 6845771320 |
| 27 | 15382308529 |
| 28 | 34563733524 |
[10,24,55,125,282,635,1428,3210,7214,16211,36427, 81852,183921,413268,928606,2086560,4688459, 10534873,23671646,53189707,119516188,268550438, 603427358,1355888967,3046654855,6845771320, 15382308529,34563733524] |